When Heizi brought over a few idle guys, Yan Fei had a brief chat with them, accompanied them for a couple of bites of food, then said he was heading back to his room to sleep and would rise again in the middle of the night.
These guys were sleeping in a room separate from his so there wasn't any worry about disturbing him; they started drinking and making a racket.
In fact, none of them really thought there would be any revenge, after all, they'd just beaten up a few cattle dealers, how big a deal was that? Besides, the local police station knew about it. Even if these people wanted revenge, they wouldn't be in such a hurry.
Who knew that something would happen outside around 8 or 9pm.